| Miscellaneous References and MentionsWhile our initial information about Acker came from various goverment sources (GNIS, FIPS), we also found mention of Acker in various books, maps and other sources. We've created the following list to keep track of the sources that proved useful in adding to our knowledge about Acker. We hope that they will be useful to you. Note: When we started collecting data about Acker, we were inconsistent about keeping track of where that data came from. As a result, this list of references and mentions is probably incomplete. Business Atlas and Shippers' Guide (1895)
 A note taken from the Shipper's Guide for Acker: Rand McNally Map of Pennsylvania (1911)
 Acker is contained in a comprehensive list of Post Offices that was created by Cameron Blevins and Richard Helbock.<1> Both the GNIS and FIPS databases contain entries for Acker. See our Misc Page for Acker for more information. Footnotes ...
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